J-B Weld 31316 3oz Blue RTV Silicone Gasket Maker & Sealant

J-B Weld 31316 3oz Blue RTV Silicone Gasket Maker & Sealant – World’s Strongest Bond

J-B Weld Blue Silicone (31316) is a 100% RTV gasket maker & sealant for sealing and bonding uneven metal and plastic flange surfaces in automotive service. It skins in about 1 hour and cures to a flexible blue gasket that won’t shrink or crack. The sensor-safe formula resists weathering and fluids commonly found under the hood, making it reliable on covers and pans that see heat cycles and vibration. Apply a continuous 1/8″ bead, surround bolt holes, assemble, and hand-tighten; after the silicone skins, finish tightening and allow full cure in 24 hours. Ideal jobs on the card include timing gear covers, transmission pans, oil pans, water pumps, valve covers, differential covers, and thermostat housings. The tapered nozzle helps lay a neat bead so reassembly goes smoothly.

J-B Weld 3oz Blue RTV Silicone Gasket Maker & Sealant At a Glance

• 100% RTV silicone: Forms a durable, waterproof gasket on clean flanges.
• Set time ~1 hour: Keeps workflow moving during reassembly.
• Sensor safe: Safe around O₂ and other engine sensors.
• Cures blue: Easy visual confirmation and OEM-style appearance.
• Won’t shrink or crack: Maintains a long-lasting seal through heat cycles.
• Easy bead control: Tapered nozzle lays consistent 1/8″ beads.
• Weather & fluid resistant: Built for common under-hood environments.
• Made in USA: Shop-grade quality and consistency.

Markets

• Automotive Repair & Performance: Everyday sealing for oil pans, timing covers, and transmission pans.
• Heavy Truck & Fleet Maintenance: Quick gasket solutions across mixed vehicles.
• Powersports & Small Engine: Covers and housings on motorcycles, ATVs, mowers, and generators.
• Marine (Engine Bay): Above-waterline sealing on pumps and housings.
• Agriculture & Outdoor Equipment: Field repairs on utility engines and driveline covers.
• Municipal & Facility Garages: Reliable gasket maker for service bays.
• Trade Schools & Tech Programs: Teaches correct RTV sealing technique.

Technicians like this blue RTV silicone because it’s predictable: apply, assemble, hand-tighten, and in about one hour it skins so the joint can be final-torqued. On oil pan gaskets, transmission pans, and timing cover corners, the bead conforms to minor surface irregularities and holds up to heat and vibration. Being sensor safe prevents issues with O₂ sensors and other electronics, and the blue cure color offers a clear visual check along the seam. Shops handling varied platforms—from passenger cars to small equipment—get a versatile gasket maker that seals cleanly and cures to a flexible, serviceable joint.

J-B Weld 31316 3oz Blue RTV Silicone Gasket Maker & Sealant Features

• 100% RTV Silicone: Forms a durable, waterproof gasket.
• Room-temperature vulcanizing silicone: Forms a tough, waterproof seal.
• Medium skin time for clean assembly: Skins in ~1 hour; full cure in 24 hours.
• Weather/fluids resistance: Stands up to typical under-hood conditions.
• Precision application: Tapered nozzle for controlled bead placement.
• Sensor-safe chemistry: Compatible with modern engine management systems.
• Made in the USA: Consistent manufacturing quality.

J-B Weld 31316 3oz Blue RTV Silicone Gasket Maker & Sealant Includes

• (1) 3 oz (85 g) tube of Blue RTV Silicone
• (1) Tapered application nozzle

J-B Weld 31316 3oz Blue RTV Silicone Gasket Maker & Sealant Specifications

• Type: RTV silicone gasket maker & sealant
• Set (Skin) Time: 1 hour
• Full Cure: 24 hours
• Cure Color: Blue
• Substrates: Metal; Plastic / Composite / PVC
• Primary Uses: Timing gear covers; Transmission pans; Oil pans; Water pumps; Valve covers; Differential covers; Thermostat housings
• Volume: 3 oz (85 g)
• Category: Automotive
• UPC: 043425313164
• Country of Origin: USA

Why Customers Select the J-B Weld 3oz Blue RTV Silicone Gasket Maker & Sealant

Shops pick this blue RTV gasket maker for everyday sealing of oil pan gaskets, transmission pans, and timing covers. The sensor-safe silicone cures to a flexible seal that resists leaks without shrinking, and the 1-hour set time fits normal bay scheduling. The tapered nozzle lays tidy beads, reducing cleanup and rework. For technicians who need a dependable, easy-to-use RTV silicone on metal and plastic flanges, J-B Weld Blue delivers clean results and reliable performance service after service.